Rouble 1843, Warsaw Mint, MSh. 20.78 g. Plain edge. Bitkin 416 var. Extremely rare variety. NGC AU Details. Attractively toned. Slightly cleaned.

From the Soedermann Collection, auction SINCONA 7, Zurich, October 2012, lot 1032 (price realized: CHF 8,000).

Note from the collector Soederman: „RRRRR. Unknown in all other numismatic literature except for Kocheregin".